Ounce to Gram

Convert Ounces to Grams instantly using our precision weight converter.

From

How to Use

Enter the Ounces

Type the weight in ounces. Decimals like 0.5 or 1.25 are perfectly fine.

Get the Grams instantly

The calculator instantly converts the weight using the exact 28.35 multiplier.

Copy if needed

Use the copy button to save the exact gram value to your clipboard.

Why Convert Ounces to Grams?

If you're using an American recipe but only own a standard metric kitchen scale (or if you just prefer the precision of grams for baking), you'll constantly find yourself needing to convert ounces into grams. While volume measurements like cups can be wildly inaccurate depending on how tightly you pack the flour, weight is absolute. Converting your ounces into grams ensures your baking comes out perfectly every single time.

The Core Rule

Grams = Ounces × 28.35

One standard ounce (the "avoirdupois" ounce used for food and postal weight) is exactly 28.3495 grams. In the kitchen, rounding to 28.35 is perfectly fine!

Common Kitchen Benchmarks

1 oz = 28 grams
4 oz (Quarter Pound) = 113 grams
8 oz (Half Pound) = 227 grams
16 oz (One Pound) = 454 grams

Real-World Examples & Use Cases

Baking Sourdough and Pastries

Baking is chemistry. If an American recipe calls for 4 oz of flour, using a measuring cup might give you 3.5 oz or 5 oz depending on humidity and how you scooped it. Converting that 4 oz to exactly 113 grams and using a digital scale guarantees your bread will rise properly.

Specialty Coffee Brewing

The specialty coffee world runs on grams. But if you buy beans from a local US roaster, the bag is almost always 12 oz or 16 oz. Knowing that a 12 oz bag is exactly 340 grams helps you calculate exactly how many 18-gram espresso shots you can pull from a single purchase.

Buying Craft Supplies and Yarn

If you're knitting from an international pattern that requires 200 grams of yarn, but your local craft store only sells skeins in 3 oz or 4 oz bundles, you'll need this conversion to make sure you buy enough material to finish your project.

How It Works

The math is straightforward because an ounce is a defined legal weight. Officially, 1 standard ounce is exactly 28.349523125 grams. For almost all practical purposes, this is rounded to 28.35. To convert: Grams = Ounces × 28.35 **Mental Math Trick:** If you don't have a calculator, multiply your ounces by 30 to get a rough estimate. For example, 4 oz × 30 = 120 grams. (The exact answer is 113 grams, so this trick slightly overestimates, but it gets you in the right ballpark when shopping!)

Frequently Asked Questions

How many grams are in 8 ounces?▼

8 ounces (which is exactly half a pound) equals roughly 227 grams. This is a very common size for blocks of cream cheese or sticks of butter.

Why do chefs prefer grams over ounces?▼

Precision! A gram is a much smaller unit than an ounce (it takes over 28 grams to make a single ounce). Measuring in grams allows chefs to make micro-adjustments to recipes without having to deal with frustrating fractions like '1/16th of an ounce'.

Is a fluid ounce the same as a regular ounce?▼

No! A fluid ounce measures volume (how much space something takes up), while a regular ounce measures weight (how heavy it is). 1 fluid ounce of water happens to weigh about 1 ounce, but 1 fluid ounce of flour weighs much less. This calculator is for weight ounces only.

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